Certain AMD processors might cause inaccurate counter data

If during your troubleshooting, you run in to some counters (Disk Read/Writes) that just don't seem correct based on the way the server is performing, then you might be running in to a drift calculation bug with certain AMD processors. You may also see negative PING response times as well.

Here is what it looks like in Performance Monitor as a steady rise in disk response times.

Avg. Disk sec/Read Counter

Avg. Disk sec/Write Counter

Over time, this may look like a problem, but it really isn't, it is just that it is being reported incorrectly.